//=============================================================================
//                                                                            
//                               OpenMesh                                     
//      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen       
//                           www.openmesh.org                                 
//                                                                            
//-----------------------------------------------------------------------------
//                                                                            
//                                License                                     
//                                                                            
//   This library is free software; you can redistribute it and/or modify it 
//   under the terms of the GNU Library General Public License as published  
//   by the Free Software Foundation, version 2.                             
//                                                                             
//   This library is distributed in the hope that it will be useful, but       
//   WITHOUT ANY WARRANTY; without even the implied warranty of                
//   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         
//   Library General Public License for more details.                          
//                                                                            
//   You should have received a copy of the GNU Library General Public         
//   License along with this library; if not, write to the Free Software       
//   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 
//                                                                            
//-----------------------------------------------------------------------------
//                                                                            
//   $Revision: 1.2 $
//   $Date: 2005-12-21 13:51:54 $
//                                                                            
//=============================================================================

#ifndef OPENMESH_ARRAY_ITEMS_HH
#define OPENMESH_ARRAY_ITEMS_HH


//== INCLUDES =================================================================


#include <Core/System/config.hh>
#include <Core/Utils/GenProg.hh>
#include <Core/Mesh/Kernels/Common/Handles.hh>


//== NAMESPACES ===============================================================

namespace OpenMesh {


	//== CLASS DEFINITION =========================================================


	/// Definition of mesh items for use in the ArrayKernelT
	struct ArrayItems
	{

		//------------------------------------------------------ internal vertex type

		/// The vertex item
		class Vertex
		{
			template <class AttribKernel, class Items> friend class ArrayKernelT;
			HalfedgeHandle  halfedge_handle_;
		};


		//---------------------------------------------------- internal halfedge type

#ifndef DOXY_IGNORE_THIS
		class Halfedge_without_prev
		{
			template <class AttribKernel, class Items> friend class ArrayKernelT;
			FaceHandle      face_handle_;
			VertexHandle    vertex_handle_;
			HalfedgeHandle  next_halfedge_handle_;
		};
#endif


#ifndef DOXY_IGNORE_THIS
		class Halfedge_with_prev : public Halfedge_without_prev
		{
			template <class AttribKernel, class Items> friend class ArrayKernelT;
			HalfedgeHandle  prev_halfedge_handle_;
		};
#endif



		//-------------------------------------------------------- internal edge type
#ifndef DOXY_IGNORE_THIS
		template <class _Halfedge>
		class Edge
		{
			template <class AttribKernel, class Items> friend class ArrayKernelT;
			_Halfedge  halfedges_[2]; 
		};
#endif



		//-------------------------------------------------------- internal face type

#ifndef DOXY_IGNORE_THIS
		template <bool _is_triangle>
		class Face
		{
			template <class AttribKernel, class Items> friend class ArrayKernelT;
			HalfedgeHandle  halfedge_handle_;

		public:
			typedef GenProg::Bool2Type<_is_triangle>  IsTriangle;
			static bool is_triangle() { return _is_triangle; }
		};
	};
#endif

	//=============================================================================
} // namespace OpenMesh
//=============================================================================
#endif // OPENMESH_ITEMS_HH defined
//=============================================================================
